The Official Google Blog has a nice summary of the internet based updates to keep track of Jolly Old Saint Nick tonight. You may know that the U.S. Defense Departments NORAD has been tracking Santa for m0re than 50 years - here's how that got started:
"The tradition began in 1955 after a Colorado Springs-based Sears Roebuck & Co. advertisement for children to call Santa misprinted the telephone number. Instead of reaching Santa, the phone number put kids through to the CONAD Commander-in-Chief’s operations "hotline." The Director of Operations at the time, Colonel Harry Shoup, had his staff check the radar for indications of Santa making his way south from the North Pole. Children who called were given updates on his location, and a tradition was born.
Merry Christmas one and all!